History of Vaccine in Timeline
A vaccine is a biological preparation that provides active acquired immunity to a particular infectious or malignant disease. It contains an agent resembling a disease-causing microorganism, often weakened or killed forms of the microbe, its toxins, or surface proteins. The vaccine stimulates the immune system to recognize the agent as a threat, destroy it, and remember it for future encounters, thus providing protection against the disease. The safety and effectiveness of vaccines have been widely studied and verified.
Mentioned in this timeline
Operation Warp Speed was a US government public-private partnership launched...
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The World Health Organization WHO is a specialized agency of...
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